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Foundations
hard
0:00.0
Simplify:
(
x
+
3
)
2
−
(
x
−
3
)
2
(x+3)^2 - (x-3)^2
(
x
+
3
)
2
−
(
x
−
3
)
2
A
6
x
6x
6
x
B
18
C
x
2
+
9
x^2+9
x
2
+
9
D
12
x
12x
12
x
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